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运用了理论方法对沿岩层探放水钻孔孔口承压套管系统进行了研究,通过3DEC数值模拟软件分别对围压、界面摩擦因数、围岩节理发育、水压和终孔直径对孔口管长度留设影响进行了分析,得出增大围压、界面摩擦因数和孔口管终孔直径能在一定程度上提高探放水钻孔的安全性,水压和节理发育程度的增加则对探放水钻孔的安全性有不利影响。
The theoretical method was used to study the pressure casing system of drilling and drilling along the rock strata. The 3DEC numerical simulation software was used to measure the confining pressure, interfacial friction coefficient, surrounding rock joint development, It is concluded that increasing the confining pressure, interface friction coefficient and the diameter of the final orifice of the orifice tube can improve the safety of the drilling and drainage holes to some extent. The increase of hydraulic pressure and the degree of joint development Safety of water drilling holes adversely affected.